A/c Cutting Off During Trips
Posted 24 August 2008 - 10:22 AM
1) It seems to cut off during trips.
2) When I drive around town, it's fine.
3) When I drive at interstate speed for longer than an hour or so, the AC cuts off (60 mph or faster).
3a) When not interstate speed, still cuts off, but normally cuts off after a 1hr & half to 2 hrs.
4) Sometimes the AC comes back on and sometimes it doesn't. I think it's an electrical issue, b/c the AC comes back when I hit a bump in the road (but only sometimes)
5) When I stop for gas, then continue my trip, the AC works fine, but for only 5 minutes of so and then it cuts off again.
I took my car into a reputable A/C mechanic earlier this summer, but they couldn't duplicate the issue, so they couldn't correct it - again, only happens during trips longer than a hour.
Anybody have a similar experience? Any advice and/or troubleshooting tips would be greatly appreciated.
Posted 25 August 2008 - 10:57 AM
Things to do to keep the system in top shape:
-New Fan clutch (if it's original, it's about a certainty it is not working correctly anymore)
-Do a coolant flush about every 18 to 24 months
-Make sure you're not leaking any coolant, there is one hose in particular that's hard to see and hard to get to that will bulge - and leak after time.
-Take the cap off the radiator and check for sludge along the top of the radiator cores. If you've got this report back.
Keep in mind that your factory temp guage has a built-in dead spot in the middle, so as the motor warms up, it will rise to the center and stop until the temperatures get really hot (around 230 degree f) and then it starts moving again. So your motor could be getting hot enough for the AC to cut off and your temp gauge not even move. The problem is the added heat puts added strain on what is considered by many owners to be an inadequate headgasket design.
Posted 25 August 2008 - 12:33 PM
Posted 26 August 2008 - 06:46 AM
Thanks again for your help!
Posted 04 September 2008 - 09:27 PM
O yea and pop your trunk and check the wiring.
if you have nothing of significance to contribute, you should probably keep your comments to yourself.
I concur with all that Rookie said -- it's an engine coolant issue.
Posted 05 September 2008 - 06:57 AM
I have had the symptoms you describe in other cars (Ford and Porsche) when the A/C needed a recharge.
Posted 25 September 2008 - 12:22 PM